I know this is a bit shocking but it's an experiment, please try it for a while and see if it works. I'd like eventually to hide the toolbar on all comment editors, giving the user the choice of showing it.

Maybe the top line by itself is a compromise but for me, the fewer buttons the better.

If one selects individual buttons, can they also be re-arranged into a single line? One of the unpleasant aspects of the toolbar is that it takes three lines. It could be nice to define a better toolbar that drops the exotic buttons, keeps the useful ones, and puts them into one row.